I spent hour or so trying to fix same issue. I followed instructions on the fourseven:scss package page and tried relative path, but with no luck. I think this is a fourseven:scss package bug. For now the acceptable solution for me was to change “api.use([‘fourseven:scss’])” to “api.use([‘fourseven:scss@3.2.0’]);”. Disclaimer: package authors claim versions >= 3.3 to be optimized and targeting Meteor 1.2, so have it in your mind when you use older version.
Hope this helps!